Vibration dampener



FIG. 1 is a top perspective view of a vibration dampener showing my new design;

FIG. 2 is a top plan view of the vibration dampener;

FIG. 3 is a side elevated view of the vibration dampener;

FIG. 4 is a bottom plan view of the vibration dampener; and,

FIG. 5 is a bottom perspective view thereof showing a plurality of vibration dampers in use condition, the broken line showing of the extra vibrations dampers and the broken line showing of a rectangular feature being shown for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a vibration dampener, as shown and described. 